bin laden's death has been a key point in president obama's re-election bid. the national geographic channel said the decision to run the movie was not politically motivated. >>> federal agents arrested dozens of medical professionals in a nationwide sweep of alleged medicare sweep. teresa garcia reports. >> reporter: the medicare fraud strike force took aim at 91 defendants including doctors and nurses in one of the largest health care fraud busts. arrests were made in baton rouge, brooklyn, chicago, dallas, houston, los angeles and miami. the charges involve allege treatment and services that were eater medically unnecessary or in some cases never actually provided. the u.s. attorney general says the fraud amounts to nearly $430 million in false billings. >> the total includes over $to 30 million in home health care fraud, more than $100 million in mental health care fraud and approximately $49 million in ambulancing transportation fraud. >> reporter: prosecutors say alpha ambulance in los angeles is responsible for the whopping transportation fraud, four to